I made doors in Art Of Illusion. I made the glass texture (I just made the default black color transparent) and when I render it in Art Of Illusion it looks good, very transparent.

This is the default glass settings:


When rendered in the Sunflow renderer in SweetHome3D, the glass windows come out black:


This is the lighter emissive color setting:


This is when the glass windows are rendered in Art Of Illusion. As you can see, the glass with the lightest emissive color is no longer transparent:


Should I go back to editing the .obj file by hand for the glass? ('usemtl flltgrey' or 'usemtl glasstransparent')